over 1/2 century we had ZERO mold and bad smells on our FL w
Well, that's not true, as people have reported on here memories of vintage machines that smelt due to misuse.
It's interesting how most of the machines I have access to (aside from my parent's Miele) have plastic outer tubs, aluminium spiders and use very little water, yet none of them have ever had even the slightest hint of smells, residues, build ups or mould, have only ever known of a drum spider failing on one machine, and that was a machine that never saw hot water, was only used with liquid detergent (i.e. no oxygen bleach) and was always left with the door shut.
Perhaps the issue is that U.S. detergents (be it powder or liquid) rarely contain oxygen bleach, and it seems to me, do not contain zeolites or phosphonates (which are the reason our detergents clean just as well without phosphates as they did before they were removed). If people do not add seperate bleach (be it oxygen or chlorine based) and live in hard water areas but do not have a mechanical water softner, the machine is going to be a haven for bacteria, full of soils deposited from the wash and mineral scale.
Perhaps a machine with less plastic parts and a better designed wash profile OR raised water levels will be less prone to these issues, but when used CORRECTLY, a cheaper modern front loader will not suffer these issues either.
It's not what you've got it's how you use it afterall
Matt